It is essential that we understand atmospheric processes to provide policymakers with accurate information they need to address rapid alteration of Earth’s climate in a timely and cost-effective manner. Most policy decisions are based on predictive atmospheric models that have become necessarily complex as they are extended to answer global-scale questions. Unfortunately, current models are unable to accurately represent all of the important chemical components due to challenges in identifying details of biogeochemical processes occurring within the terrestrial environment that have a significant impact on the atmosphere above it. This is especially true for soil microbial emissions of reactive nitrogen [e.g., nitrous acid (HONO), nitric oxide (NO), and nitrogen dioxide (NO2)], which directly and indirectly affect climate by controlling the oxidative capacity of the atmosphere, lifetime of greenhouse gases, and formation rate of aerosols. This project will provide an improved mechanistic understanding of the fate of reactive nitrogen in soil that will enable these processes to be more accurately scaled from the laboratory to the ecosystem and global scales. The long-term goal is to take a unique multidisciplinary approach to examine how variability in land surfaces and soil properties impact reactive nitrogen emissions, and to link soil fluxes of these gases to their microbial sources using a combination of laboratory and field studies, isotopic analysis, and genomic techniques. The specific objective of our participation in the PROPHET 2016 campaign is to measure soil fluxes of NO, NO2, and HONO in a deciduous forest environment, in addition to relevant soil biogeochemical parameters for our site. Chemiluminescence detection will be used as the main mode of detection, in combination with an array of soil chambers located in the vicinity of the primary campaign site. The results will be used to: (1) understand the sources and sinks of reactive nitrogen in soil; (2) construct a nitrogen budget for the campaign; (3) improve representation of the land-atmosphere exchange of reactive nitrogen in chemical-transport models.